a(n) = T(10,n), array T given by A048505.

Terms

a(0) =1a(1) =122a(2) =387a(3) =965a(4) =2221a(5) =4941a(6) =10813a(7) =23453a(8) =50589a(9) =108701a(10) =232861a(11) =497565a(12) =1060765a(13) =2256797a(14) =4792221a(15) =10157981a(16) =21495709a(17) =45416349a(18) =95813533a(19) =201850781a(20) =424673181a(21) =892338077a(22) =1872756637a(23) =3925868445a(24) =8220835741a(25) =17196646301a(26) =35936796573a(27) =75027709853a(28) =156497870749